linux-kernel - Re: [PATCH] misc: rtsx: Fixed rts5260 power saving parameter and sd glitch

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Date:   Wed, 10 Apr 2019 15:47:14 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     吳昊澄 Ricky <ricky_wu@...ltek.com>
Cc:     arnd@...db.de, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] misc: rtsx: Fixed rts5260 power saving parameter and sd
 glitch

at 16:56, ricky_wu@...ltek.com wrote:

> From: RickyWu <ricky_wu@...ltek.com>
>
> this patch fixes rts5260 power saving parameter
> make power saving function work on L1.1, L1.2
>
> Signed-off-by: RickyWu <ricky_wu@...ltek.com>
> ---
>  drivers/misc/cardreader/rts5260.c | 21 +++++++++++----------
>  1 file changed, 11 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/misc/cardreader/rts5260.c  
> b/drivers/misc/cardreader/rts5260.c
> index da22bcb62b04..b510d3f46587 100644
> --- a/drivers/misc/cardreader/rts5260.c
> +++ b/drivers/misc/cardreader/rts5260.c
> @@ -195,7 +195,7 @@ static int sd_set_sample_push_timing_sd30(struct  
> rtsx_pcr *pcr)
>  		| SD_ASYNC_FIFO_NOT_RST, SD_30_MODE | SD_ASYNC_FIFO_NOT_RST);
>  	rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, CLK_LOW_FREQ);
>  	rtsx_pci_write_register(pcr, CARD_CLK_SOURCE, 0xFF,
> -			CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
> +		CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);

Just a nit, seems to be an unnecessary change.

>  	rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
>
>  	return 0;
> @@ -238,8 +238,8 @@ static int rts5260_card_power_on(struct rtsx_pcr  
> *pcr, int card)
>  	/* Reset SD_CFG3 register */
>  	rtsx_pci_write_register(pcr, SD_CFG3, SD30_CLK_END_EN, 0);
>  	rtsx_pci_write_register(pcr, REG_SD_STOP_SDCLK_CFG,
> -			SD30_CLK_STOP_CFG_EN | SD30_CLK_STOP_CFG1 |
> -			SD30_CLK_STOP_CFG0, 0);
> +				SD30_CLK_STOP_CFG_EN | SD30_CLK_STOP_CFG1 |
> +				SD30_CLK_STOP_CFG0, 0);

Ditto.

>
>  	rtsx_pci_write_register(pcr, REG_PRE_RW_MODE, EN_INFINITE_MODE, 0);
>
> @@ -315,12 +315,12 @@ static void rts5260_init_ocp(struct rtsx_pcr *pcr)
>
>
>  		rtsx_pci_write_register(pcr, RTS5260_DVCC_CTRL,
> -				RTS5260_DVCC_OCP_THD_MASK,
> -				option->sd_800mA_ocp_thd);
> +					RTS5260_DVCC_OCP_THD_MASK,
> +					option->sd_800mA_ocp_thd);

Ditto.

>
>  		rtsx_pci_write_register(pcr, RTS5260_DV331812_CFG,
> -				RTS5260_DV331812_OCP_THD_MASK,
> -				RTS5260_DV331812_OCP_THD_270);
> +					RTS5260_DV331812_OCP_THD_MASK,
> +					RTS5260_DV331812_OCP_THD_270);

Ditto.

That said, the patch works,
Tested-by: Kai-Heng Feng <kai.heng.feng@...onical.com>

>
>  		mask = SD_OCP_GLITCH_MASK;
>  		val = pcr->hw_param.ocp_glitch;
> @@ -451,6 +451,7 @@ static void rts5260_pwr_saving_setting(struct  
> rtsx_pcr *pcr)
>  	lss_l1_2 = rtsx_check_dev_flag(pcr, ASPM_L1_2_EN)
>  			| rtsx_check_dev_flag(pcr, PM_L1_2_EN);
>
> +	rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, 0xFF, 0);
>  	if (lss_l1_2) {
>  		pcr_dbg(pcr, "Set parameters for L1.2.");
>  		rtsx_pci_write_register(pcr, PWR_GLOBAL_CTRL,
> @@ -573,10 +574,10 @@ static int rts5260_extra_init_hw(struct rtsx_pcr  
> *pcr)
>  	 * to drive low, and we forcibly request clock.
>  	 */
>  	if (option->force_clkreq_0)
> -		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG,
> +		rtsx_pci_write_register(pcr, PETXCFG,
>  				 FORCE_CLKREQ_DELINK_MASK, FORCE_CLKREQ_LOW);
>  	else
> -		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG,
> +		rtsx_pci_write_register(pcr, PETXCFG,
>  				 FORCE_CLKREQ_DELINK_MASK, FORCE_CLKREQ_HIGH);
>
>  	return 0;
> @@ -704,7 +705,7 @@ void rts5260_init_params(struct rtsx_pcr *pcr)
>  	option->ocp_en = 1;
>  	if (option->ocp_en)
>  		hw_param->interrupt_en |= SD_OC_INT_EN;
> -	hw_param->ocp_glitch =  SDVIO_OCP_GLITCH_800U | SDVIO_OCP_GLITCH_800U;
> +	hw_param->ocp_glitch =  SD_OCP_GLITCH_100U | SDVIO_OCP_GLITCH_800U;
>  	option->sd_400mA_ocp_thd = RTS5260_DVCC_OCP_THD_550;
>  	option->sd_800mA_ocp_thd = RTS5260_DVCC_OCP_THD_970;
>  }
> -- 
> 2.17.1